1. 1) P. T. Sharpe, Methods of Cell Separation, Elsevier, Amsterdam (1988).
2. 2) A. Giman-Sachs, Anal. Chem., 66, 700 A (1994).
3. 3) S. C. Stinson, Chem. Eng. News, March 29, 36 (1999).
4. 4) S. Hjertén, Separation Methods, H. Bioemendal (ed.), Elsevier, Amsterdam, pp.117∼128 (1977).
5. 5) A. Zhu and Y. Chen, J. Chromatogr., 470, 251 (1989).